1
Part 1 - Piercing - general scheme
2
Part 2 - Piercing with a vertical line
3
Part 3 - Piercing with a horizontal line
4
Part 4 - Piercing with an oblique line
5
Part 5 - Permeation - general scheme
6
Part 6 - Permeation of two prisms
7
Part 7 - Permeation of two piramids
8
Part 8 - Permeation of a prism and a piramid